Packing composition.



JONATHAN SEWELL, OF ANACONDA, MONTANA.

' @ACKING COMPOSITION.

raoaaai,

No Drawing.

Specification of Letters Patent.

Patented July ii, rare.

Application filed March 3, 1913. Serial No. 751,764; v

To all whom it may concern:

Bevit known that I, J oNA'rHAN SEWELL, a citizen of the United States,residing at Anaconda, in the county of Deerlodge and State of Montana,have invented'a new and useful Packing Composition, of which thefollowing is a specification.

The object of my invention is to produce a plastic, semi-metallicpacking for pistonrods, valve-stems, steam expansion joints, stuffingboxes of any character, and in fact, for any available purposewhatsoever, which will be practically unaffected by heat; one containinga minimum proportion of metal; one which can be readily molded by hand;one which will permit ready renewal of old packings by the'mere additionthereto of fresh packing, thus avoiding waste; one which is durableandinexpensive; one which may be manufactured without the employment ofspecial tools; one which i smooth and devoid of grit; one which does notmeltunder high temperatures owing to the comparatively low proportion ofits metal content; and one possessing further and other advantagesflowing from the nature of the ingredients composing the same.

My composition contains the following ingredients, combined by weight inthe proportions stated, to-Wit:

Anti-friction metal 54 parts. Flake graphite 18 parts. Cylinder oil 18parts. Asbestos cement 6 parts. Asbestos fiber 4 parts.

The average anti-friction metal employed has a composition approximating15 parts suitable method. The cylinder oil, graphite, asbestos cementand asbestos fiber are mixed together in any manner and the pulverizedmetal is then added thereto, the wholebeing worked into a plastic massby hammering or working through a suitable mill. Theasbcstos cement isused as an absorber and re- Analyzed in the light of the function andpurpose subserved by the several ingredients, the composition may besaid to contain a metallic base (anti-friction metal), a lubricant(cylinder oil), an absorber or retainer for said, lubricant (asbestoscement) and a heat resisting component (asbestos fiber), the

whole combining in a single composition, the virtues character-12mg theindividual components. The graphite as is Well understood,

is a mineral possessing inherent lubricating qualities, in the presentinstance supplementing the cylinder oillubricant retained by theasbestos cement. Cylinder oils as well understood in the art havegenerally (though not necessarily) a petroleum base.

Having described my invention, what I claim is The herein describedcomposition of mat ter for use as a, packing, consisting by weight ofsubstantially fifty-four parts of pulverized anti-friction metal,eighteen parts of flake graphite, eighteen parts of cylinder oil,

six parts of asbestos cement, andfour parts of asbestos fiber, andformin a plastic mass.

In testimony whereof I a x my signature, in presence of two Witnesses.

JUNATHAN SEWELL.

Witnesses:

M. E. Romance, U. A. Guiana.

